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United States Patent | 6,145,483 |
Asai | November 14, 2000 |
A two-cycle internal combustion engine includes a control valve disposed in a communicating passage for communicating the combustion chamber to a chamber portion adjacent to the combustion chamber. The control valve controls the opening and closing of the communicating passage. A fuel or an air-fuel mixture is supplied into the combustion chamber through the communicating passage. The fuel injection opening of the communicating passage has a height which is smaller than the distance between outermost side surfaces of the piston rings to reduce the amount of the air-fuel mixture or combustion gas leaking from the combustion chamber into the crank chamber through gaps between the piston and the opening. Therefore, reduction in engine output or seizure of the piston due to local temperature rise is avoided.
Inventors: | Asai; Masahiro (Wako, JP) |
Assignee: | Honda Giken Kogyo Kabushiki Kaisha (Tokyo, JP) |
Appl. No.: | 083087 |
Filed: | May 22, 1998 |
May 24, 1997[JP] | 9-150375 |
Current U.S. Class: | 123/73C; 123/65V; 123/193.6 |
Intern'l Class: | F02B 033/04 |
Field of Search: | 123/73 C,73 B,73 E,73 V,65 V,532,65 PE,193.6 |
880958 | Mar., 1908 | Bachle et al. | 123/65. |
1149296 | Aug., 1915 | Scott et al. | 123/73. |
1181634 | May., 1916 | Bivert | 123/73. |
1743558 | Jan., 1930 | McCabe | 123/65. |
1839576 | Jan., 1932 | Mohr et al. | 123/65. |
1952275 | Mar., 1934 | Mohr | 123/65. |
2242538 | May., 1941 | Naccache | 123/73. |
4969425 | Nov., 1990 | Slee | 123/73. |
5271358 | Dec., 1993 | Katoh et al. | |
5575246 | Nov., 1996 | Ito | 123/65. |
5857449 | Jan., 1999 | Ishikawa et al. | 123/557. |
5950581 | Sep., 1999 | Nishida et al. | 123/73. |
Foreign Patent Documents | |||
0764774 A2 | Mar., 1997 | EP. | |
50-60617 | May., 1975 | JP. | |
9-144545 | Jun., 1997 | JP. |